Non-ischemic priapism in children is an uncommon entity usually related to blunt trauma in the perineal region and subsequent fistula formation into the corpus cavernosum. In this report we present the case of a 7-year-old boy who had undergone perineal trauma and developed non-ischemic priapism confirmed radiologically. He was treated by conservative measures along with ultrasonographic monitoring. We discuss the diagnostic approach, the radiologic findings and the mainly conservative management of this infrequent pathology.